u/DefNotATaxEvader

Maybe you guys can help me out. NOT SELLING, just looking for advice. Attached are examples of the photomontage/collage I create. The images I use for these projects are just from the internet, I have cut them and shade them, I do stuff to every image. I’m extremely proud of these and have considered making them into magnets or stickers, perhaps even trying to sell prints. Is this illegal??? Google is so confusing